Liquid fuel stove



Jan. 8, 1935. s HADW CK 1,987,179

LIQUI'D FUEL STOVE Filed. March '7, 1932 3 Sheets-Sheet 1 I Yfr----------1-------- l I l i :15?

i 3 E 1 l I l I I )5; I Q #43 E 32 Jan..8, 1935. L s. CHADWICK LIQUID FUEL STOVE 5 Sheets-Sheet 2 Filed Ma rch 7. 1932 m n We 131% XQ W dttmuuq;

Jan. 8, 1935. L. s. CHADWICK LIQUID FUEL STOVE Filed March 7. 1952 3 Sheets-Sheet 3 IIII'IIIIII'II) Patented Jan. 8, 1935 I UNITED STATES PATENT OFFICE LIQUID FUEL STOVE Lee S. Chadwick, Shaker Heights, Ohio, assignor to Perfection Stove Company, Cleveland, Ohio, a corporation of Ohio Application March 7, 1932, Serial No. 597,168

16 Claims. (Cl. 158-120) The general purpose of this invention is to proby side in order to retain the desired scale and vide a liquid fuel heating stove that will operate compact the view within the space available; Fig. efliciently and satisfactorily on oil drained from 3 shows the valve in front elevation; Fig. 4 is a the crank cases of automotive vehicle engines. transverse central vertical section through the 5 It is immediately apparent from this that the valve casing, with the valvebody in elevation, the 6 stove is especially appropriate for use in oil and present view being on a. scale enlarged over that gas stations and public garages where such fuel of the preceding figures and looking in the oppois available in sizeable quantities without cost. site direction; Fig. 5 is a. horizontal section An accumulation of lubricating oils obtained as through the valve on the line 5-5 of Fig. 4; Fig.

- above described represents a heterogeneous or 6 is a detail sectional plan showing the valve hanl0 conglomerate mess including, at times, more or die, the plane of sectionbeing indicated by the less kerosene and gasolene, invariably containline 6-6 of Fig. "I; Fig. 7 is a section on the line ing an appreciable amount of sediment, and vary- 77 of Fig. 6; Fig. 8 is an elevational view of ing greatly in its viscosity. Consequently the the U-shaped washer through which the valve matter of feeding such a mixture in measured operating handle is connected to the tubularstem 15 quantities that are variable at will presents a of the valve; Fig. 9 is a perspective view of the problem. indicator of the metering valve, and Fig. 10 is an It is a further object of my invention, thereelevational view of the upper end of the tubular fore, to provide a so-called metering valve that valve stem. 1

will successfully handle fuel of the above men- The stove structure in which I have shown my 20 tioned quality so that the size of the fire may be invention incorporated follows in a general way readily controlled with reasonable accuracy, and the heating apparatus that constitutes the subwhich, with the fuel line, is equipped withcleanject matter of the co-pending application of Marc out means that is especially convenient of use and Resek, Charles J. Kessler and myself, Serial No.

that is readily accessible and that may be actu- 488,210, filed October 13, 1930, which has result- 25 ated to dislodge obstructions in the valve and in ed in Patent No. 1,944,593, issued Jan. 23, 1934, the feed line, that tend to interfere with a free the character of the firepot, combustion chamber flow 01' the fuel, without interrupting the opera- .etc; of said heating apparatus being especially tion or the stove. adapted to the burning of such fuel as that with Another object is to provide an arrangement whichI amhere concerned. 80 whereby the indicator of the metering valve may The stove structure comprises a base 1 that is be easily and quickly adjusted to compensate for supported a suitable distance above the floor by changes that may occur during the use of the aplegs 2, and rising from the base is a, cylindrical paratus that would affect the iuelflow and also to shell 3 surmounted by an annular member 4 that obviate the necessity for such accuracy in the supports a casing 5 enclosing the combustion 35 production and assembly of the parts as might chamber designated 6. A top I is applied to the otherwise be called for. upper end of the casing 5, and immediately there- Astill further object of the invention is to probelow a flue collar or connection 8 extends rearvide a simple and economical construction that ,warclly from the casing. Projecting into the in- 40 contributes to the ease and speed of production terior of the casing from said collar or connec- 40 nd a m lytion is a bafile 9.

with these objects in view, along with others Attached, as by bolts 10, to the top portion that will appear as this description proceeds, the of the member 4, that defines the bottom of invention may be defined as consisting of the comthe combustion chamber 6 is a flange 11 of a bination and arrangement of parts set forth downwardly converging annulus 12 that. is con- 45 in the claims annexed hereto and illustrated, act t t t 1 r end to form a flat portion cording t the Present Preferred embodiment, in 13 and beyond which it is curled downwardly to the accompanying drawings which form a part provide what I may term a lip 14. Suspended 'hereof and wherein Fig. 1 is a sectional side elefrom the flat portion 13 of the annulus 12,

vation of a heating stove incorporating the inthrough connecting members or rivets 15, is the 50 vention; Fig. 2 is a central vertical section, on a flrepot 16, the top wall 17 of which'converges scale considerably enlarged over that of Fig. '1, ,upwardly and has a flat annular portion opposed oitlze metering valve and the fuel feed line and to the portion 13 oi? the annulus l2 and beyond the parts associated therewith, the view being which it is curled downwardly to form a lip 18 separated into two parts that are arranged side that is arranged in spaced relation tothe previously mentioned lip 14. The space between the top of the firepot and the adjacent end of the annulus 12 forms a passageway that is designated 20 for the admission of secondary air to the firepot. Primary air is admitted to the firepot through openings 21 in the peripheral wall thereof.

The firepot is formed with a sump or basin 22 in its bottom wall, and with an opening in its front that is fitted with a neck 23 that projects through a flanged opening 24 inthe shell 3. The neck 23 is large so as to provide ready access to the interior of the firepot 16 for lighting and cleaning purposes; and it is adapted to be closed by a plug 25 that has a plate 26'attached to its front end. A bayonet joint connection between the plug 25 and neck 23 is effected by-an L-shaped channel 27 in the plug that receives an inward projection 28 on the neck.

Rising from a rearwardly extending portion of the base is a wall 30, and rearwardly of said wall, in substantially the horizontal plane of the lower portion of the firepot, is located a receptacle 31 to the upper rear edge of which is hingedly connected at 32 a swinging carrier 33 fora reservoir 34. The carrier is arranged to swing from a downwardly inclined position rearwardly of the reservoir (in which position it is adapted to have placed into it in upright posi tion, the reservoir 34) upwardly and over the receptacle to its normal upright position, illustrated in Fig. 1, thereby to invert the reservoir and allow it to assume a position in which it is supported at its lower rear corner by a ledge 35 and at the upper forward corner by a portion 36 of the carrier. The carrier is equipped with a handle 37 for swingingit. The reservoir has a valve controlled'outlet opening of a common type, and the valve is opened when the reservoir is in inverted position by contact of the valve stem 39 with an elevation 40 in the bottom of the receptacle. The reservoir is liquid sealed when the fuel level in the reservoir reaches the mouth of the reservoir; and it will be noted that this liquid level is in a' plane between the top and bottom of the sump or basin '22 of the firepot 16. Substantially the same construction as that above set forth is illustrated and described in greater detail in the aforesaid application Serial No. 488,216, now Patent No.-

The receptacle 31 has a forwardly extendingneck 42 to whichis clamped, with a leak-proof joint at 43, a valve casing 44. The neck 42 has a relatively large opening, and correspondingly large openings 45 and 46 are formed in the valve casing and receptacle, respectively, for register therewith. The valve casing isvsecured to the reservoir by screws 47. An inlet fitting 50 opens through the bottom wall of the firepot 16 into the sump or basin 22, and at its lower end receives a nipple 51. Clamped by fittings 53 to the nipple 51 and to the lower end of the valve casing 44 are the opposite ends of a .fuel -i'eed pipe or conduit 55.

Screwed into the internally threaded upper end of the valve casing 44 is the enlarged externally threaded upper end of a tubular valvebody 56. Said body is provided near its lower end with a tapered portion 57 that cooperates with a seat 58. This seat is relatively sharp and consequently the tapered portion 57, ground accurately to fit it cireumferentially, will effectively close the valve opening, that is surthe seat. An extension 59 of the tubular valve.

body below' the tapered portion 5'7 thereof has a working fit within the bore of the valve casing, and in one side of the extension 59 is a V-notch 60.' As the tapered portion of the valve rises from the seat, the small end of the V notch 60 is uncovered and effects an opening through the valve which opening gradually enlarges in breadth as well as in height as the valve ascends. It will be noted that the relatively large passageway through which the valve casing and receptacle 31 communicate, has its axis substantially coincident with the normal liquid level in said receptacle and in the basin 22 of the firepot. a

A tubular valve stem 62 has its lower end fitted within a counterbore of the tubular valve body and is secured therein against withdrawal and against turnig by a set screw 63'. At its upper end the stem is journaled within a flanged opening of a support 64 that is attached, by screws 65, to a member 66 that is connected to the upbranches of a U-shaped washer 72, shown alone in Fig. 8. An operating handle or wheel 73, preferably formed of sheet metal, is applied to the top of the tubular stem above the washer 72, said handle having-a depression in its top wall for the reception of said washer. The handle is also provided with an axial boss 74'that has its upper end flanged inwardly so as to fit over the upper end of the tubular stem. At diametrically opposite points, screws. 75 are engaged through holes in the handle 73 and are-threaded into tapped holes in the extended side portions of a plate 76 from one edge of which the previously mentioned indicator or pointer 70 depends. The end of the pointer is horizontally disposed above a dial '78 that rests upon the support 64 and is attached thereto byscrews 79. The dial is graduated to indicate the position of the valve and, when the latter is closed, the indicator or pointer 70 engages one side of the stop 69. The valve is prevented from being lifted above its maximum open position by the engagement of the indicator or finger with the opposite side of the stop 69. The indicator may be adjusted with respect to the valve by loosening the screws 75, and when the valve is forced downwardly against its seat and the pointer or indicator is swung about to engage the side of the stop 69 which represents 011 position, it will be known that the parts are in correct relation; The screws 75 may then be tightened to'firmly clamp the operating handle and indicator to the washer 72 that is locked against turning to the tubular valve stem 62. in

tends through the tubular valve body and through i the conduit 55 and, when in normal position,

' terminates within the inlet fitting 50 of the firepot 16. The element 81 and rod are yieldingly sustained in normal position by a spring 84 that surrounds the rod and is interposed between the boss of the operating handle 73 and an abutment 85 on the rod 80 immediately below the turned over upper end of said rod that forms a handle designated 86. By reciprocating the rod, any obstruction within the lower portion of the tubular valve body'and within the conduit 55 or fitting 50 may be dislodged so as to reestablish a free flow of fuel through the valve, conduit and fitting to the basin or sump of the firepot. The clean-out element may be retracted until the joint which connects it with the rod 80 engages the stop provided by the side portions of the U-shaped washer 72 and by depressing the rod until the spring 84 is fully compressed the lower end of the clean-out element may be projected into the firepot to remove any obstruction which may clog or tend to clog the outlet end of the fitting 50. It is evident that when the carrier 33 is swung to inoperative position and the reservoir 34 is thereby removed from the receptacle 31, the openings leading into the valve casing from the receptacle 31 may be readily inspected and cleaned. k

To light the stove, the closure or plug 25 is removed and a lighted match or a piece of buming paper or the like may be inserted through the neck 28 into the firepot to ignite the fuel that partially fills the sump or basin 22. Combustion is supported by the primary air that enters through the openings 21 and is promoted by the secondary air that is drawn in through the passageway 20 and is directed downwardly by' the lips 14 and 18 into the firepot, the products of combustion rising within the combustion chamber 6 and escaping through the flue collar or connection 8. The size of the neck 23 is ample to afford convenient access in the firepot forcleaning, as well as for lighting purposes.

Having thus described my invention, what I claim is:

1. In a liquid fuel stove, the combination of a burner, a fuel dispensingreceptacle, means for establishing, a maximum liquid level therein, communicative connections between said receptacle andthe burner, said connections including a valve casing that opens into the receptacle at said level, and a conduit leading from said valve casing to the burner, a tubular valve body supported within the casing with its bore aligning substantially with that of the conduit, the casing incorporating a valve seat and the body a part for cooperation therewith, means for operating the valve body to move said part toward and from the seat, means operable from above the valve body downwardly therethrough and through said conduit for dislodging obstructions therein.

2. In a l'quid fuel stove, the combination of a burner, a fuel dispensing receptacle, communicative connections between "the receptacle and burner including a valve casing adjacent the receptacle and .a conduit leading therefrom to the burner, means establishing a maximum liquid level in the receptacle, the passageway through which the valve casing communicates wlththe receptacle being relatively large and in the plane of said liquidlevel, a tubular' valve body in said casing whose lower end has a working fit within a bore of the casing, a relatively sharp valve seat surrounding the upper end-of said bore, the valve body having a tapered part for cooperation with the seat and being notched on one side bel w said seat, the valve body being threaded within the upper end of the casing whereby when the valve body is rotated it will move the aforesaid tapered part toward and from said seat, a tubular valve stem connected to the upper end of the valve body, an operating handle applied to the upper end of said stem, a rod projecting from above said handle downwardly into the stem, and a flexible cleaning element connected to the lower end of said rod and extending downwardly through the valve body and conduit. I t

3. In a liquid fuel stove, the combination of a burner, a fuel dispensing receptacle, means for determining the maximum liquid level therein,

communicative connections between said recep tacle and the burner including a valve casing that communicates with the receptacle through a relatively large opening that is situated at about the aforesaid level and a conduit connecting said valve casing with the burner, the valve casing including a bore constituting a bearing and about the upper end of which is disposed a valve seat,

its lower end inserted within said counterbore,

means locking the stem to the valve body, a handle applied to the upper end of the stem, means associated with said handle for indicating the position of said valve, of rod projecting downwardly into the stem, and a flexible cleaning element connected to the lower end of said rod and extending through the valve body into the conduit.

4. In a liquid fuel stove, the combination of a burner, a source of fuel supply, communicative connections between said source and the burner, said connections including a .valve and stem by means of which thevalve is operated, a member fixed against turning with respect to ,said stem, an operating handle mounted on the stem and rotatable with respect thereto and disposed on one side of said member, an element having a lateral projection disposed on the opposite side of said member, means for binding the element and operating handle together to clamp themto said member, and a stop arranged to beengaged by said projection.

5. In a liquid fuel stove, the combination of a burner, a source of fuel supply, communicative connections between said source and the burner,

burner, a source of fuel supply, communicative.

connections between said source and the burner including a valve casing that is open at its upper 4 7 end, a valve body operating within said casing and exposed through the upper end thereof, a stem connected to and rising from the valve body, a

support spaced above the valve casing and within which said stem is journaled, said stem having opposed notches adiacent its upper end, a U- shaped washer embracing the stem and having its branches disposed within said notches whereby the washer is held against turning with respect to the stem, an operating handle applied to the top of the stem and engaging the upper side of said washer, an indicator including a base applied to the underside of said washer, screws for drawing said base and handle together to clamp the aforesaid washer between them, and means on said support wherewith the indicator cooperates.

7. In a liquid fuel stove, the combination of a burner, a source of fuel supply, communicative connections between said source and the burner including a valve casing that is open at its upper end, a valve body operating within said casing and exposed through the upper end thereof, a stem connected to and rising from the valve body, a support spaced above the valve casing and within which said stem is journaled, said stem'having opposed notches adjacent to its upper end, a U- shaped washer embracing the stem and having its branches disposed within said notches whereby the washer is held against turning with respect to the stem, an operating handle applied to the top of the stem and engaging the upper side of said washer, an indicator including a base applied to the underside of said washer, screws for drawing said base and handle together to clamp the aforesaid washer between them, and a retractable stop carried by the support for cooperation with the indicator.

8. In a stove for burning liquid fuel, the combination of a fire pot, a conduit for delivering the fuel in liquid form to the fire pot, a valve in said conduit remote from the fire pot for controlling the fuel supply, said valve including a hollow valve body, and cleaning means operable through the valve body and conduit for dislodg ing obstructions therein.

9. In a stove for burning liquid fuel, the combination of a fire pot, a conduit comprising a,

valve housing and through which the fuel is delivered in liquid form to the fire pot, a hollow valve body operable in said housing for controlling the fuel supply, means determining the maximum liquid level in the fire pot, means having an opening therein through which access may be had to the interior of the valve body and conduit, said opening being above said maximum liquid level, and cleaning means operable from the outside through said opening for dislodging obstructions in the valve body and conduit.

10. In a stove for burning liquidfuel, the combination of a fire pot, a reservoir, a conduit for delivering the fuel in liquid form from the reservoir to the fire pot, a valve in said conduit remote from the fire pot and including a tubular valve body, and cleaning means operable through the.

conduit and valve body for dislodging obstructions therein.

11. In a stove for burning liquid fuel, the combination of a fire pot, a reservoir, a conduit for delivering the fuel in liquid form from the reservoir to the fire pot, a valve in said conduit having a hollow body, a flexible cleaning element extending through the conduit and valve body, and means for reciprocating said cleaning element.

12. In a stove for burning liquid fuel, the combination of a fire pot, a source of fuel supply, a conduit for delivering the fuel in liquid form from said source to the fire pot, means fixing a maximum liquid level in the fire pot and conduit, a valve housing in said conduit remote from the fire pot, a hollow valve body operable in said housing, means having an opening therein through which access may be had to the interior of the valve body and conduit, said opening being above said maximum liquid level, and cleaning means extending through said opening into the valve body and conduit for dislodging obstructions therein.

13. In a stove for burning liquidfuel, the combination of a fire pot, a source of fuel supply, a conduit for delivering the fuel in liquid form from said source to the firepot, means fixing a maximum liquid level in the fire pot and conduit, a valve in said conduit remote from the fire pot including a tubular valve body extending above and below said level, and cleaning means operable through the conduit and valve body for dislodging obstructions therein.

14. In a stove for burning liquid fuel, the combination of a fire pot, a source of fuel supply, a conduit for delivering the fuel in liquid form from said source to the fire pot, means determining the maximum liquid level in the fire pot and conduit, a valve in said conduit remote from the fire pot including a tubular valve body extending above and below said liquid level, a tubular valve stem rising from said body, means for operating the valve through the medium of said stem, and cleaning means extending downwardly through the stem, valve body and conduit.

15. In a stove for burning liquid fuel, the combination of a fire pot, a source offuel supply, a conduit for delivering the fuel in liquid form from said source to the fire pot, means determining the maximum liquid levelin the fire pot and conduit, a valve in said conduit remote from the fire pot including a tubular valve body extending above and below said liquid level, a tubular valve stem rising from said body, means for operating the valve through the medium of said stem, an actuating member extending downwardly through the stem, and a flexible cleaning element connected to said member and reciprocable thereby through. the valve body and conduit.

16. In a stove for burning liquid fuel, the combination of afire pot, a source of fuel supply, a conduit for delivering the fuel in liquid form from said source to the fire pot, a valve in said conduit remote from the fire pot including a tubular valve body, a tubular valve stem rising from the valve body above the maximum, liquid level in the fire pot, means for operating the valve through the medium of said stem, cleaning means extending downwardly through the stem and through the valve body and conduit, and a spring for lifting.

said means to retract it and cause its terminal to normally repose within the conduit. LEE S. CHADWICK. 

